It might seem unlikely, but once upon a time the cereal you tiredly shove into your face every morning came out of a gun. But it was a very special kind of gun: a puffing gun.
There is iron in cereal. That’s good! But it looks pretty gross. Here’s how to find it: soak a cup of cereal in a Ziploc bag with water, mix it up and then rub a magnet over the bag. You’ll see the metallic iron trailing the magnet. You eat that!